Improvement in duplex pressure-gauges



P. B. HOVEY.

Pressur e- Gage. No, 104,593.

Patented June 21, I870.

".FETERs, FflDTO-UTMOGRAPHER WAsHING ON. D c.

, ignited g1 M25 7 To ell wlmm it may concern;

invented anew and useful Improvement in Stea'nn Gauges; and I do herebydeelarethat the following is afulLclean and exact. description of thesame, reference being bad to the accompanying drawing which forms a partof this specification, in whieh-i, .7

Figure 1 represents a front view of a a the arrangement of hands hereinsp'ecifie a @jFigure 2 is a longitudinallseetion through the cen-,.terof part-s hereinafter claimed. f The nature of my invention consistsin providing a steam-gauge with two distinct pressure springs, bothplaced within one case, which springs are connected by any of theordinary methods, with two distinct about acom'mon center, and eachspring indicating its toor loss of power in on'e springis immediatelymade apparent bythe other, the hands revolving either in the same oropposite directions, the whole forming, as y it were, two gaug'esin'oneease, a"nd having so many' parts in common that it is simpler andcheaper than any form of gauge intended to accomplish the sameobjectknown to the inventor.

my invention, I give the following description of the a, constructionandoperation of my improvement A-represeuts a frame, 'coutaining' what areusually termed me gauge movements" for operating .the hands, in whichframe are represented two sectors, B v B, turning on a common shaft, 1*,which gear respectively into the pinions E E, one of these pinions beingpermanently attached tothe revolving shaft K, and

and, revolves on this shaft K,both sleeve and shaft projecting out asuiiicient distanceto bring the hands, when attached in front of thedial, in the same manner asiu the ordinary clock or watch;

rivirnovnivmn'r m, UPLEX; PRESSURE-senses.

'Be=it known that I, PHILO B.AHOVEY, of the town,

and county of New London, State-of Connecticut, have gauge, withhauds,which,.by my arrangement, are made to revolveown pressure onacommon diahhso that any accident the'other to a hollow tube or sleeve,which surrounds 7 Pnino B; nevi: r, on NEW LONDO C N Letters Patent No.104,593, dated June 21,1870.

:vne Schedulerefened to in these LetterePatei1t and making part onesame.

a j o spring, and is only introduced as one of the-many formsof springsfor the purposes of illustration.

Itwillbe seen from this description that the hands act entirelyindependent of each other and revolve about. a common center, and thatthe outside easeframe A and the dial plate are common to both springs,and that the arrangement is a much simpler one than ,if both springsrequired every part to be in duplicate.

The advantages of the arrangement are that it provides forthe use of twogauges, asit were, inone case, and thus provides-an additional safeguardfrom exploof order. a a I donotclaim for this gauge any particular formof spring, as anyof the ordinary springs may be used to advantage withthis arrangement. Neither do I elai iii any partie'ular way of makingthe connection between the springs and parts claimed, as almost any ofthe the ordinary forms can be adopted. Neither do I claimtwogauge-sprihgsin one outside case, when used apart from my claim, as I amaware that gauges have been madewith twodistinet' springs in one case,but these gauges were entirely separate and had no parts in common,aud'did not register from a common cen-j I y, H a ter upon a commondial. To emblethose skilledin the art to make" and use Having thusdescribed my invention,

What I claim is- I lacing. within one inelosin g-case of a steam-gaugethe mechanism of two steam-gauges, when the same are connected to onecommon supply-pipe and register from a common'center upon the same dial,by means of 'a combination and arrangement substantially as hereindescribed.

PHI-LO B. HOVEY.

Witnesses:

J AS. M. ALBERTSON, O. KELTERBORN.

sions, which freqiientlyloccur from gauges being out

